Mirrored antenna system and method for beam steering for SAR mitigation

Patent metadata

Field	Value
Publication number	US-9935361-B2
Application number	US-201615042672-A
Country	US
Kind code	B2
Filing date	Feb 12, 2016
Priority date	Feb 12, 2016
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A mirrored antenna system for beam steering in an information handling system is disclosed. The mirrored antenna system includes a first antenna and a second antenna configured to operate alternatively as a radiator and as a reflector. The first and the second antenna are arranged in mirror symmetry to one another and separated by a dielectric medium. The mirrored antenna system further includes a switch coupled to the first antenna and the second antenna configured to switch the feed in response to a trigger.

First claim

What is claimed is:

1. A mirrored antenna system for beam steering, comprising:
a first mirrored antenna system that includes:
a first antenna and a second antenna each configured to operate alternatively as a first mirrored antenna system radiator and as a first mirrored antenna system reflector, wherein the first antenna and the second antenna are arranged in mirror symmetry to one another and separated by a dielectric medium; and
a switch coupled to the first antenna and the second antenna configured to switch a feed in response to a trigger; and

a second mirrored antenna system that includes:
a third antenna and a fourth antenna configured to operate alternatively as a second mirrored antenna system radiator and as a second mirrored antenna system reflector;

wherein the first mirrored antenna system and the second mirrored antenna system are stacked such that the radiation patterns of the first mirrored antenna system and the first mirrored antenna system are aligned vertically.

2. The mirrored antenna system of claim 1 , wherein a size of a separation of the first antenna and the second antenna is dependent on an antenna volume.

3. The mirrored antenna system of claim 1 , wherein the first antenna and the second antenna each includes a proximity sensor.

4. The mirrored antenna system of claim 1 ,
wherein to operate alternatively as the first mirrored antenna system radiator and as the first mirrored antenna system reflector includes to respectively operate via a radiator mode and a reflector mode; and
wherein the radiator mode and the reflector mode are mutually exclusive.

5. The mirrored antenna system of claim 1 , wherein when the switch is in a closed or on position, the first antenna operates as the first mirrored antenna system radiator.

6. The mirrored antenna system of claim 5 , wherein when the switch is in an open or off position, the first antenna operates as the first mirrored antenna system reflector.

7. An information handling system comprising:
a central processing unit;
a memory that is communicatively coupled to the central processing unit and that is configured to store instructions executable by the central processing unit;
a first mirrored antenna system for beam steering, the first mirrored antenna system including:
a first antenna and a second antenna configured to operate alternatively as a first mirrored antenna system radiator and as a first mirrored antenna system reflector, wherein the first antenna and the second antenna are arranged in mirror symmetry to one another and separated by a dielectric medium; and
a switch coupled to the first antenna and the second antenna configured to switch a feed in response to a trigger; and

a second mirrored antenna system, the second mirrored antenna system including:
a third antenna and a fourth antenna configured to operate alternatively as a second mirrored antenna system radiator and as a second mirrored antenna system reflector;

wherein the first mirrored antenna system and the second mirrored antenna system are stacked such that the radiation patterns of the first mirrored antenna system and the second mirrored antenna system are aligned vertically.

8. The information handling system of claim 7 , wherein a size of a separation of the first antenna and the second antenna is dependent on an antenna volume.

9. The information handling system of claim 7 , wherein the first antenna and the second antenna each includes a proximity sensor.

10. The information handling system of claim 7 ,
wherein to operate alternatively as the first mirrored antenna system radiator and as the first mirrored antenna system reflector includes to respectively operate via a radiator mode and a reflector mode; and
wherein the radiator mode and the reflector mode are mutually exclusive.

11. The information handling system of claim 7 , wherein when the switch is in a closed or on position, the first antenna operates as the first mirrored antenna system radiator and when the switch is in an open or off position, the first antenna operates as the first mirrored antenna system reflector.

12. The information handling system of claim 7 , further including a processor and a wireless module, the wireless module having instructions stored in the wireless module, the instructions being executable by the processor to switch the feed between the first antenna and the second antenna.

13. The information handling system of claim 12 , wherein when the switch is in a closed or on position, the fit antenna operates as the first mirrored antenna system radiator and when the switch is in an open or off position, the first antenna operates as the first mirrored antenna system reflector.

14. The information handling system of claim 7 , wherein the information handling system is a hinged device and the first mirrored antenna system is located proximally to a hinge of the hinged device.

15. The information handling system of claim 7 , further comprising:
a sensor coupled to the switch and configured to detect a change in capacitance;
wherein the trigger is based at least on the sensor detecting the change in capacitance.

16. A method for beam steering in an information handling system, comprising:
operating, in a radiator mode, a first antenna in a first mirrored antenna system stacked with a second mirrored antenna system such that the radiation patterns of the first mirrored antenna system and the second mirrored antenna system are aligned vertically;
operating a second antenna in the first mirrored antenna system in a reflector mode in relation to the radiator mode of the first antenna;
switching the first antenna from the radiator mode to the reflector mode; and
switching the second antenna from the reflector mode to the radiator mode.

17. The method of claim 16 , wherein the radiator mode and the reflector mode are mutually exclusive.

18. The method of claim 16 , wherein the second mirrored antenna system includes a third antenna and a fourth antenna configured to operate alternatively as a second mirrored antenna system radiator and as a second mirrored antenna system reflector.

19. The method of claim 18 , further including operating only one antenna as a radiator at any given time.

20. The method of claim 16 , further comprising:
determining a change in capacitance;
wherein the switching the first antenna from the radiator mode to the reflector mode and the switching the second antenna from the reflector mode to the radiator mode are performed in response to the determining the change in capacitance.

Assignees

• Dell Products Lp

Inventors

• Chang Ching-Wei
• Chen I-Yu

Classifications

• H01Q17/001

  for modifying the directional characteristic of an aerial · CPC title

• H01Q15/0006

  Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices (H01Q15/12, H01Q15/22, H01Q15/24 take precedence) · CPC title

• H01Q1/24

  with receiving set · CPC title

• H01Q1/243

  with built-in antennas · CPC title

• H01Q3/24 Primary

  varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching · CPC title